Use -Werror but don't fail on #warning directives

Use -Werror but don't fail on #warning directives

[Daniel Janzon]

Hello!

I'm a fan of using #warning instead of //Fixme but I'm also a fan of compiling with -Werror.

Can those two desires somehow be reconciled? To be explicit, are there any combination of gcc flags including -Werror that will compile the following program? (Using gcc only options is totally ok.)

int main()
{
  #warning "not implemented yet"
}

All the best,
Daniel

Re: Use -Werror but don't fail on #warning directives

[Jonathan Wakely]

On 29 April 2013 11:06, Daniel Janzon wrote:
> int main()
> {
>   #warning "not implemented yet"
> }

-Werror -Wno-error=cpp should do it

RE: Use -Werror but don't fail on #warning directives

[Daniel Janzon]

>>On 29 April 2013 11:06, Daniel Janzon wrote:
>> int main()
>> {
>>   #warning "not implemented yet"
>> }
>
>-Werror -Wno-error=cpp should do it

Thanks, it didn't work on gcc-4.4 though:

daniel@mio$ gcc-4.4 -Werror -Wno-error=cpp -o test-warning test-warning.c
cc1: error: -Werror=cpp: No option -Wcpp
daniel@mio$ 

So maybe I'm quite likely stuck, I mean they probably added no-cpp in
later releases of gcc because it couldn't be done in earlier releases.
Of course it's possible to explicitly list all warnings I want to fail on
but that's kind of ugly.

Thanks anyway,
Daniel

Re: Use -Werror but don't fail on #warning directives

[Jonathan Wakely]

On 29 April 2013 12:33, Daniel Janzon wrote:
>
>>>On 29 April 2013 11:06, Daniel Janzon wrote:
>>> int main()
>>> {
>>>   #warning "not implemented yet"
>>> }
>>
>>-Werror -Wno-error=cpp should do it
>
> Thanks, it didn't work on gcc-4.4 though:

You didn't say you were doing a history project ;-)

(It would have helped to say you're not using a currently supported version.)

> daniel@mio$ gcc-4.4 -Werror -Wno-error=cpp -o test-warning test-warning.c
> cc1: error: -Werror=cpp: No option -Wcpp
> daniel@mio$
>
> So maybe I'm quite likely stuck, I mean they probably added no-cpp in
> later releases of gcc because it couldn't be done in earlier releases.

Right.  There is more fine-grained control over warnings in recent releases.